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Sources of high creep resistance of modern high-chromium martensitic steels

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Abstract

In this work, the sources of the high creep resistance of martensitic steels containing 9% Cr were considered based on the results of studying the evolution of the dislocation structure of martensite in P92-type steel in creep at 650°C. The steel structure after tempering was characterized by significant elastic microstrains of the crystal lattice, which were produced by dislocations of the same sign and long-range stresses from the dislocation boundaries of laths. The high creep strength of martensitic steels containing 9% Cr is reached by the action of both threshold stresses from carbonitrides M(C,N) and by internal elastic stresses.

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Authors and Affiliations

  1. Belgorod State National Research University, ul. Pobedy 85, Belgorod, 308015, Russia

    V. A. Dudko, A. N. Belyakov & R. O. Kaibyshev

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  1. V. A. Dudko
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  2. A. N. Belyakov
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  3. R. O. Kaibyshev
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Correspondence to V. A. Dudko.

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Original Russian Text © V.A. Dudko, A.N. Belyakov, R.O. Kaibyshev, 2015, published in Doklady Akademii Nauk, 2015, Vol. 464, No. 1, pp. 47–50.

Presented by Academician V.M. Schastlivtsev December 25, 2014

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Dudko, V.A., Belyakov, A.N. & Kaibyshev, R.O. Sources of high creep resistance of modern high-chromium martensitic steels. Dokl Phys Chem 464, 191–193 (2015). https://doi.org/10.1134/S0012501615090018

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  • DOI: https://doi.org/10.1134/S0012501615090018

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